All four giant pandas on loan to a western Japan zoo will return to China around late June, ahead of the expiration of their lease agreement, the zoo operator said Thursday.The 24-year-old Rauhin and her children -- Yuihin, 8, Saihin, 6, and Fuhin, 4 -- will leave Adventure World amusement park in Shirahama, Wakayama Prefecture, for their new home at the Chengdu Research Base of Giant Panda Breeding in China's Sichuan Province, according to the operator.The Wakayama park began a breeding cooperation program with the Chinese panda research base in 1994 and was home to Eimei, who came to Japa…READ FULL ARTICLE